You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.

kontur-http-toolkit-core
1.0.0.dev1

This version was deleted from PyPI around 2024-10-08. Installing fails with:
$ pip3 install kontur-http-toolkit-core==1.0.0.dev1 ERROR: Could not find a version that satisfies the requirement kontur-http-toolkit-core==1.0.0.dev1
View other deleted versions of kontur-http-toolkit-core

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-10-07/ \ kontur-http-toolkit-core==1.0.0.dev1
Sign up for StableBuild to get an API key (it's free and takes <60 seconds!)

Or, download files manually

And install manually via pip:
kontur_http_toolkit_core-1.0.0.dev1-py3-none-any.whl (24.2KB)
kontur_http_toolkit_core-1.0.0.dev1.tar.gz (15.2KB)